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Theresa Supino waits for a jury’s verdict Friday, Feb. 20, 2015, in Black Hawk County District Court in Waterloo, Iowa. Jurors acquitted Supino of two counts of first-degree murder in the slayings of her husband and his girlfriend more than ... more >

WATERLOO, Iowa (AP) - An Iowa woman was acquitted of two counts of first-degree murder Friday in the slayings of her husband and his girlfriend more than 30 years ago.

After nearly seven hours of deliberation and 10 days of testimony, jurors found Theresa Supino not guilty in the 1983 killings of Steven Fisher and Melisa Gregory, whose bodies were found on the Copper Dollar Ranch northwest of Newton. Supino, 54, was arrested in March in connection with the slayings.

Jurors weighed witness testimony and crime scene evidence presented throughout the nearly three-week trial in which prosecutors said Supino killed Fisher and Gregory out of anger over their relationship. The defense maintained that the murders could have been related to the former ranch owner’s drug trafficking and dismissed claims that Supino had made three confessions, saying that two couldn’t be confirmed and one was taken out of context.

During closing arguments, defense attorney Steve Addington also reminded jurors that they had been instructed that they required more than a confession to find a defendant guilty. Since police found no physical evidence at the scene, he said, jurors needed something aside from Supino’s alleged confessions.

The jury of eight women and four men were tasked with finding Supino guilty of first-degree murder, guilty of second-degree murder or not guilty, the Waterloo-Cedar Fall Courier reported.

Officials told the Newton Daily News that the case is now closed and there will be no active investigation into the murders unless new leads become available.

Once dismissed, Supino hugged her attorneys and family members and said she’s felt “like a caged animal” over the past year.